Last Modified: 01-30-2024 6.11:8.1.0 Doc ID: RM100000001H41A
Model Year Start: 2019 Model: RAV4 Prod Date Range: [02/2019 - 12/2021]
Title: PARKING BRAKE: ELECTRIC PARKING BRAKE SYSTEM (w/o Vacuum Brake Booster): C13AD; Open in +B Circuit; 2019 - 2021 MY RAV4 RAV4 HV [02/2019 - 12/2021]

DTC

C13AD

Open in +B Circuit

DESCRIPTION

The parking brake ECU assembly is supplied with power to operate the motor via the +B and +B2 terminals.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Memory

Note

C13AD

Open in +B Circuit

Both of following conditions are met:

  1. Ignition switch ON or electric parking brake switch (integration control and panel assembly) pulled to lock side with ignition switch off.
  2. Motor +B voltage is Mid when the parking brake motor is not operating or motor +B voltage is Lo when the parking brake motor is operating for approximately 0.5 seconds or more.

HINT:

For details on the threshold value changes according to the auxiliary battery voltage value, refer to "Threshold Changes According to Auxiliary Battery Voltage".
  • Wire harness or connector
  • Parking brake ECU assembly

Yes

An electric parking brake system malfunction is displayed on the multi-information display.

DTC Detection Condition Combination Table: C13AD (Pattern 1, Pattern 2, Pattern 3, Pattern 4)

 

Vehicle Condition

Pattern 1

Pattern 2

Pattern 3

Pattern 4

Diagnosis Condition

Electric parking brake switch (integration control and panel assembly) is operated to lock side with ignition switch off

○

○

-

-

Ignition switch ON

-

-

○

○

Malfunction Status

Motor +B voltage is Mid when parking brake motor is not operating

○

-

○

-

Motor +B voltage is Lo when parking brake motor is operating

-

○

-

○

Detection Time

Approximately 0.5 seconds

Approximately 0.5 seconds

Approximately 0.5 seconds

Approximately 0.5 seconds

Trip Count

1 trip

1 trip

1 trip

1 trip

HINT:

  • If the conditions match either of these patterns, a DTC will be output.
Threshold Changes According to Auxiliary Battery Voltage

*a

Parking Brake Motor Not Operating

*b

Parking Brake Motor Operating

*c

Auxiliary Battery Voltage (V)

*d

+B and +B2 Terminal Voltage (V)

*e

Normal Range

*f

DTC Detection Range

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • Inspect the fuses for circuits related to this system before performing the following inspection procedure.
  • The electric parking brake may still operate up to 20 seconds after the ignition switch is turned off. Before disconnecting connectors or fuses, turn the ignition switch off and wait 20 seconds or more.
  • When replacing the parking brake ECU assembly, operate the electric parking brake switch (integration control and panel assembly) from the lock side to the release side, as the parking brake indicator light blinks when the ignition switch is first turned to ON.

PROCEDURE

1.

READ VALUE USING TECHSTREAM (RH MOTOR +B VOLTAGE / LH MOTOR +B VOLTAGE)

(a) Turn the ignition switch off.

(b) Connect the Techstream to the DLC3.

(c) Turn the ignition switch to ON and the Techstream on.

(d) Enter the following menus: Chassis / Electric Parking Brake / Data List.

(e) Check the Data List.

Chassis > Electric Parking Brake > Data List

Tester Display

Measurement Item

Range

Normal Condition

RH Motor +B Voltage

Parking brake motor RH (parking brake actuator assembly RH) +B voltage display

Lo, Mid, Error or Hi

Hi

LH Motor +B Voltage

Parking brake motor LH (parking brake actuator assembly LH) +B voltage display

Lo, Mid, Error or Hi

Hi

Chassis > Electric Parking Brake > Data List

Tester Display

RH Motor +B Voltage

LH Motor +B Voltage
OK

USE SIMULATION METHOD TO CHECK

NG

2.

CHECK HARNESS AND CONNECTOR (PARKING BRAKE ECU ASSEMBLY - AUXILIARY BATTERY)

(a) Turn the ignition switch off.

(b) Disconnect the parking brake ECU assembly connector.

*a

Front view of wire harness connector

(to Parking Brake ECU Assembly)

(c) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

M36-7 (+B) - Body ground

Always

11 to 14 V

M36-12 (+B2) - Body ground

Always

11 to 14 V
OK

REPLACE PARKING BRAKE ECU ASSEMBLY 2019 MY RAV4 RAV4 HV [02/2019 - 10/2019]; PARKING BRAKE: ELECTRIC PARKING BRAKE ECU: REMOVAL 2020 MY RAV4 RAV4 HV [10/2019 - 08/2020]; PARKING BRAKE: ELECTRIC PARKING BRAKE ECU: REMOVAL 2021 MY RAV4 RAV4 HV [08/2020 - 12/2021]; PARKING BRAKE: ELECTRIC PARKING BRAKE ECU: REMOVAL

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR